Manchester Pediatric Associates Send Us A Message PhoneThis field is for validation purposes and should be left unchanged.LocationChoose LocationSouth Windsor OfficeTolland OfficeDoctorChoose DoctorJohn Walker, MDOlga Bulygina, MDSreenivas Gunturu, MDLori Bryon, PABrittany MolkenthinScott O'Brien, PA-CTristin Geist, APRNNikisha Hamal, MSN, FNP-CFrederic Bernstein, DO, FACC, FSCAIName*Email* Phone*Message*Please use this form for general information purposes only. DO NOT send personal health information through this form. Specific patient care must be addressed during your appointment.